[MonoDevelop] Applying policies from the command line

Mart Sõmermaa mrts.pydev at gmail.com
Sun Feb 24 17:49:31 UTC 2013

After looking around a bit in code, the solution looks to be pleasantly
(for the default policy):


using Mono.Addins;
using MonoDevelop.CSharp.Formatting;
using MonoDevelop.Projects.Policies;
using NUnit.Framework;

namespace TestFormatter
  class MainClass
    public static void Main (string[] args)
      Mono.Addins.AddinManager.Initialize ();

      var input = "class Test {}";

      var formatter = new CSharpFormatter ();
      // CSharpFormatter.MimeType is internal
      var mimeTypeChain = new string[] { "text/x-csharp" };
      var policies = PolicyService.DefaultPolicies;
      var result = formatter.FormatText (policies, mimeTypeChain,
                    input, 0, input.Length);

      Assert.AreEqual (result, "class Test\n{\n}");



However, this results in


 System.Reflection.TargetInvocationException: Exception has been
 thrown by the target of an invocation. --->
 System.TypeInitializationException: An exception was thrown by
 the type initializer for
 MonoDevelop.CSharp.Formatting.CSharpFormattingPolicy --->
 System.InvalidOperationException: This PolicyContainer can't be


It's a bit hard to debug as the debugger does not catch the exception, so I
didn't dig into it too deeply.
Does anyone have any idea what's causing this from the first glance?

But generally, wouldn't having `mdtool applypolicy -p Mono -r .` in the git
pre-commit hook be
really nice for cleaning up code automagically? I personally miss this a
lot, MonoDevelop's
policies are much more powerful than e.g. NArrange (although I've not used
the latter).

(See e.g. https://metacpan.org/module/Code::TidyAll::Git::Precommit ).

As for general usefulness, there are a number of people who are looking for


And the issue has been raised in mono-devel list already back in 2008:

 * http://lists.ximian.com/pipermail/mono-devel-list/2008-August/028863.html

So, besides being useful for the wider world, I guess this would also help
in keeping both Mono and Monodevelop code clean.


On Tue, Jan 29, 2013 at 5:07 PM, Mart Sõmermaa <mrts.pydev at gmail.com> wrote:

> Hello!
> Have there been any discussions around running the MonoDevelop policy tool
> from the command line?
> It is an excellent tool and a it would be nice to apply consistent code
> formatting and
> other policies  across a project automatically where not all people use
> MonoDevelop
> as the main developer UI.
> Perhaps something in the lines of
>   mdtool applypolicy file.cs # apply default policy to file.cs
>   mdtool applypolicy -r dir # recursively apply default policy to all
> files in directory dir
>   mdtool applypolicy -f policyfile file.cs # apply policy from file
> policyfile
>   mdtool applypolicy -p Mono file.cs # apply the stock or custom policy
> labeled 'Mono'
> If not and someone cares to point me to the right direction (what modules
> to look into,
> any concerns that you foresee etc) I might look into this myself.
> Thanks for the good work!
> Best,
> Mart Sõmermaa
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